Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994apj...421..550d&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 421, no. 2, p. 550-560
Astronomy and Astrophysics
Astrophysics
24
Magnetohydrodynamics, Plasma Acceleration, Plasma Control, Plasma Dynamics, Plasma Turbulence, Plasma Waves, Space Plasmas, Wave Propagation, Electron Acceleration, Magnetic Control, Magnetic Fields, Plasma Density, Plasma Frequencies
Scientific paper
We consider the resonant interaction of energetic charged particles and transverse plasma wave propagating parallel and/or antiparallel to the uniform magnetic field B0 in an underlying background plasma of density n. The coupling of the plasma waves and the energetic particles will be controlled by the ratio n/(the absolute value of B02. A variation of this ratio leads to a strong variation of the dynamics of the energetic particles. By taking into account the whole transverse plasma branch for the resonant interaction we discuss the influence of the background plasma density, the background magnetic field, the cross helicity, and the magnetic helicities on the dynamics of charged particles in astrophysical plasmas. It is shown that low-energy electrons can be accelerated efficiently by the higher electromagnetic waves and short-wavelength whistlers for low values of the ratio n/(the absolute value of B02, which means for low values of the ratio of plasma frequency to gyrofrequency.
Dung Rudiger
Petrosian Vahe
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